Effect of Caffeine on Sprint and Vertical Jump Reaction Time in Male Collegiate Basketball Players

Student Author(s)

Joel Rietsema

Faculty Mentor(s)

Dr. Kevin Cole

Document Type


Event Date



Numerous studies have been conducted that link caffeine supplementation to improved reaction time. The purpose of this study was to investigate whether there was a difference in reaction time during sport-specific movement with supplementation of various dosages of caffeine. Over a period of three weeks, 11 male NCAA Division III basketball players participated in two tests: 1) Vertical jump and 2) 40 yard dash. The tests were administered on three separate testing days. Each participant was randomly assigned in a double blind fashion to one of three caffeine supplementation dosages (3mg/kg body weight, 6mg/kg body weight, or placebo) until they had completed testing days with each dosage. Their reaction time to movement after an auditory stimulus was measured, as well their 40 yard dash time and vertical jump height. Caffeine supplementation of the 3mg/kg body weight dosage resulted in a decreased reaction time to movement of 0.042s ± 0.019s when compared to the placebo group (p < 0.1). No other statistically significant relationship was found between dosage level of caffeine and reaction time or performance. Caffeine supplementation at relatively low dosages (approximately 3mg/kg body weight) can improve reaction time to begin movements requiring maximal speed sprinting.

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